ENH: natively support Graph in all Join Counts statistics

[martinfleis]

Adding a native support to all Join Counts classes.

This uncovered two bugs in libpysal, one in eliminate_zeros and other in isolates. I have fixes for both locally, a PR is coming. Marking this as a draft until these land in lib.

[martinfleis]

Dev is green 🎉

[codecov]

Codecov Report

Attention: Patch coverage is 91.83673% with 4 lines in your changes missing coverage. Please review.

Project coverage is 80.7%. Comparing base (3ffe8ed) to head (b62070d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #295     +/-   ##
=======================================
+ Coverage   80.7%   80.7%   +0.1%     
=======================================
  Files         24      24             
  Lines       3239    3269     +30     
=======================================
+ Hits        2613    2639     +26     
- Misses       626     630      +4     

Files	Coverage Δ
esda/join_counts.py	97.4% <92.9%> (-0.7%)	⬇️
esda/join_counts_local.py	98.2% <90.9%> (-1.8%)	⬇️
esda/join_counts_local_bv.py	98.8% <92.3%> (-1.2%)	⬇️
esda/join_counts_local_mv.py	98.2% <90.9%> (-1.8%)	⬇️

[jGaboardi]

• CI is all green - libpysal is pinned - we have approvals
• I'll merge tomorrow in the AM unless someone else already has or there are detractors